If you want to learn how to penetrate wireless networks and the internal's of wifi, go check out the aircrack-ng site, its all there

If however like me you want the certification, then do it

For me, I wanted a Security certification and to experience an OffSec course, so OSWP seemed like the perfect candidate as well as I knew pretty much nothing about wireless (I'd followed a video on youtube on breaking wep previously)

So, if you want the cert, go for it, else all the information is freely available on the aircrack-ng site for absolutely free

I want the cert and wanted to see what offsec course was like. Did you read the book then watch all the video or did u read the book then watch the video that goes with it. Is the exam hard or do they just ask you to crack wireless exactly like you have been showed to it?